Its amazing although you need to make the tail flufflyer and longer and have the neck shorter and the back to be a bit smaller.(Unless you are making your cat chubby.)But besides that its amazing!!!!!!!!!
Though I know that you're no anatomy expert,this kind of quick sketch was helpful XD!(I never do skeleton sketches for animals)...Though I agree that the neck needs to be shorter because it looks more like a ferret!Nevertheless,I thank you for showing this cuz I suck at doing paws and legs and...yeah!
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http://www.exchange3d.com/images/uploads/aff70/cat_anatomy-1.jpg